Hard Drive/Optical Drive Access Indicator
The Hard Drive/Optical Drive Access indicator glows when your internal hard drive is being accessed.
Note that flickering is normal.
NumLk Indicator
The NumLk indicator glows when the integral keyboard is set in ten-key numeric keypad mode.
CapsLock Indicator
The CapsLock indicator glows when your keyboard is set to type in all capital letters.
ScrLk Indicator
The ScrLk indicator states that your scroll lock is active.
21 - Status Indicator Panel